The main difference lies in the sprocket's axis of rotation and the positioning of the motor unit. The horizontal model is entirely above deck; the vertical model has the gearmotor below deck, taking up minimal space on the deck and providing greater chain grip.
Multiply the total weight of the mooring line (anchor + chain) by 4. The result is the minimum instantaneous pulling force that the windlass must be able to provide.
This is the peak load that the windlass can withstand for a limited period of time—typically when the anchor needs to be pulled free from the seabed. It should be distinguished from the working load during lifting, which can be sustained continuously.
The distance between the hawse hole and the chain accumulated in the hopper must not be less than 40 cm (16") to ensure proper accumulation and prevent jams.
For boats up to 10–12 meters, 12V is the most common solution. For larger boats with longer wiring runs, 24V reduces voltage drops and ensures more consistent performance.